| 철계 비정질/나노 결정 하이브리드 소재의 연자성 특성 |
| 이연주1, 전종규1, 장태석2, 이민우2, 김용진3, 양동열3, 이미정1, 최현주1 |
1국민대학교 신소재공학부
2선문대학교 신소재공학과
3한국기계연구원 부설 재료연구소 분말/세라믹연구본부 |
| Soft Magnetic Properties of Fe-based Amorphous/Nanocrystalline Hybrid Materials |
| Yeonjoo Lee1, Jonggyu Jeon1, Teasuk Jang2, Minwoo Lee2, Yongjin Kim3, Dongyeol Yang3, Mijung Lee1, Hyunjoo Choi1 |
1Dept. of Advanced Materials Engineering, Kookmin University, Seoul 02707, Republic of Korea
2Dept. of Advanced Materials Engineering, Sunmoon University, Asan 31460, Republic of Korea
3Powder & Ceramics Division, Korea Institute of Materials Science, Changwon 51508, Republic of Korea |
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Received: 26 September 2016; Accepted: 3 November 2016. Published online: 9 May 2017. |
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| ABSTRACT |
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In this study, the effect of the crystalline structure on the magnetic properties of Fe-based amorphous powder is investigated. The Fe-B-P-C-Nb-Hf amorphous powder with excellent soft magnetic properties is prepared via gas-atomization, and the atomized amorphous powder is annealed in order to generate a small amount of nanosized crystallites in the amorphous matrix. For the powder annealed at 375 ℃, the coercivity is decreased by 96.15% from 3632.68 to 139.89 A/m, and the magnetization is increased 19.04% from 0.192 to 0.229 Wbm/g. For the powder annealed at 425 ℃, the coercivity is decreased 95.14% to 176.72 A/m and the magnetization is increased 0.71% to 0.193 Wbm/g. The simultaneous enhancement of the coercivity and magnetization can be attributed to the generation of a small amount of nanosized crystallites and the release of the residual stresses. |
| Keywords:
Fe-based amorphous powder, ball-milling, crystallization, coercivity, magnetization |
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